Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by
mindat.org
There are no ages for
Magnetite
at
Princeton Mine (No. 1; No. 2; And No. 3 Shafts; Smith Cheshire Swanzey), Gwinn, Marquette Iron Range, Marquette Co., Michigan, USA